Airports across the UK are currently conducting trials of airport scanners that can identify liquid explosives in hand baggage.

The EU is testing scanning technology at various locations across the continent, including several UK airports, in an attempt to ease the stringent rules on taking liquids onto aircraft.

The restrictions were first enforced three years ago after a bomb plot was foiled in the UK, which has since seen British airports spend million on enhancing security.

According to existing rules, passengers are allowed to carry liquids in containers with a maximum capacity of 100ml.

The rule has resulted in the confiscation of thousands of tons of liquids including deodorants, shampoo and alcohol.

The Department for Transport (DfT) said that while trials were being conducted in Europe, EU-wide constraints will remain effective as liquid explosives were still a serious threat.